5% Niacinamide Serum with 4% Tea Tree Extracts | 1% Ceramide Complex |

According to WebMD:

Niacinamide Uses for Skin

Research on the benefits of niacinamide for skin is still in its early stages, but topical niacinamide contains properties that help treat some skin conditions, such as acne and eczema. It helps the skin build proteins and lock in moisture to prevent the damaging effects of external factors.